Read-Only Vulnerability in Kubewarden Policy Engine for Kubernetes
CVE-2026-29773

4.3MEDIUM

Key Information:

Vendor

Kubewarden

Status
Kubewarden-controller
Vendor
CVE Published:
9 March 2026

What is CVE-2026-29773?

The Kubewarden Policy Engine for Kubernetes allows users to deploy namespaced AdmissionPolicies safely. However, an attacker with specific permissions can exploit deprecated host-callback APIs to gain unauthorized read access to Ingresses, Namespaces, and Services. This vulnerability does not grant write capabilities or access to sensitive resources like Secrets or ConfigMaps, but it creates significant risks by exposing critical cluster resources to unauthorized users.

Affected Version(s)

kubewarden-controller < 1.33.0

References

https://github.com/kubewarden/kubewarden-controller/secur...
x_refsource_CONFIRM
https://github.com/kubewarden/kubewarden-controller/pull/...
x_refsource_MISC
https://github.com/kubewarden/kubewarden-controller/commi...
x_refsource_MISC

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.